Browsing by Author "Wang, S."
Now showing items 1-8 of 8
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A Neutral-Point Diode-Clamped Converter with Inherent Voltage-Boosting for a Four-Phase SRM Drive
Abdel-Aziz, A. A.; Ahmed, K. H.; Wang, S.; Massoud, Ahmed; Williams, B.W. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)This article proposes a new asymmetric neutral-point diode-clamped (NPC) multilevel converter for a four-phase switched reluctance motor drive. The inbuilt NPC clamping capacitors are used for both voltage level clamping ... -
A Novel Converter Station Structure for Improving Multiterminal HVDC System Resiliency Against AC and DC Faults
Wang, S.; Ahmed, K.H.; Adam, G.P.; Massoud, Ahmed; Williams, B. W. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In an effort to minimize the power disruption between a dc grid and ac grids that host power converters during ac and dc network faults, this paper proposes a novel converter station structure to improve ac and dc fault ... -
A T-Type Modular Multilevel Converter
Wang, S.; Massoud, Ahmed; Williams, B.W. ( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)This article proposes a novel modular multilevel converter (MMC) named 'T-type MMC' (T-MMC) for reliable, controllable, and efficient performance in energy conversion applications. Circuitry configurations and control ... -
Analysis and Assessment of Modular Multilevel Converter Internal Control Schemes
Wang, S.; Adam, G.P.; Massoud, Ahmed; Holliday, D.; Williams, B. W. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Adoption of distributed submodule (SM) capacitors in a modular multilevel converter (MMC) necessitates complex controllers to ensure the stability of its internal dynamics. This paper presents comprehensive analysis and ... -
Drug release kinetics from a drug-eluting stent with asymmetrical coat
Zhang, H.; Li, X.; Deng, W.; Wang, X.; Wang, S.; Ge, J.; Toft, E.... more authors ... less authors ( IMR Press Limited , 2017 , Article)The aim of this study was to investigate the drug release profiles of biodegradable polymer sirolimus- or paclitaxel-eluting stents with asymmetrical coating (BPSES-A or BPPES-A) both in vitro and in vivo. In vitro, the ... -
Electrical characteristics and density of states of thin-film transistors based on sol-gel derived ZnO channel layers with different annealing temperatures
Wang S.; Mirkhani V.; Yapabandara K.; Cheng R.; Hernandez G.; Khanal M.P.; Sultan M.S.; Uprety S.; Shen L.; Zou S.; Xu P.; Ellis C.D.; Sellers J.A.; Hamilton M.C.; Niu G.; Sk M.H.; Park M.... more authors ... less authors ( American Institute of Physics Inc. , 2018 , Article)We report on the fabrication and electrical characterization of bottom gate thin-film transistors (TFTs) based on a sol-gel derived ZnO channel layer. The effect of annealing of ZnO active channel layers on the electrical ... -
Enhancement of electrical characteristics of a-ZTO TFTs based on channel layers produced with alternating precursor concentration
Uprety S.; Hanggi D.; Yapabandara K.; Mirkhani V.; Khanal M.P.; Schoenek B.; Dhar S.; Park M.; Hamilton M.; Wang S.; Hames W.E.; Sk M.H.... more authors ... less authors ( Institution of Engineering and Technology , 2018 , Article)The enhancement in electrical characteristics of the thin film transistors (TFTs) based on the mixed-stacked amorphous zinc tin oxide (a-ZTO) with an alternating precursor concentration is reported. The channel layers were ... -
Strategies for Decoupling Internal and External Dynamics Resulting from Inter-Arm Passive Component Tolerances in HVDC-MMC
Wang S.; Adam G.; Massoud A.; Holliday D.; Williams B. ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)Modular Multilevel Converter (MMC) performance may be adversely affected by passive component tolerances, such as submodule capacitance and arm inductance variations. Depending on control strategies, the differences in ...